Adjustable pressure regulator



FIG. 1 is a perspective view of an adjustable pressure regulator, showing my design.

FIG. 2 is a front elevation view thereof.

FIG. 3 is a rear elevation view thereof.

FIG. 4 is a left side elevation view thereof.

FIG. 5 is a right side elevation view thereof.

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines in the drawings depict environmental structure and boundaries and form no part of the claimed design. 

CLAIM The ornamental design for an adjustable pressure regulator, as shown and described. 